Authorities have increased security, but holiday revelers along the Charles River said they won't be giving in to fear of terrorism by staying away from celebrations.

"We understand the concern, and to ease public we will have more patrols," Transit Police Superintendent Joseph O'Connor said.

In addition to state and local police, the FBI and Army National Guard are also on hand.

"We usually have about 250 to 300 soldiers and airman out here. And now we're up to about 450 for this event,” said Maj. Gen. Scott Rice of the Massachusetts National Guard. “That's for us in the Guard."

State police teamed up with the U.S. Coast Guard to patrol the Charles River where the massive fireworks barge is set up. Boats were not only on guard, but divers were also checking under bridges for anything suspicious.

Boston Pops conductor Keith Lockhart also said Thursday's concert and fireworks show will be a perfect time for people to come together as Bostonians following the bombings.

"I've done this show 19 times. Every year it reflects the mood of the country," Lockhart said. "I remember the first Fourth after 9/11 -- obviously that's on people's minds -- but it's also a chance to show the resilience of this community."

Gov. Deval Patrick said he's looking forward to attending the holiday event and believes it will be a great day.

Look back: Jennifer Hudson dazzles Esplanade crowds

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Neil Ungerleider/WCVB-TV

Jennifer Hudson

Academy Award-winning actress and Grammy Award- winning recording artist, Jennifer Hudson was the star of the 2012 Boston Pops annual July 4th concert on the Esplanade. She is seen here during the July 3rd rehearsal concert.